The invention discloses a cross-
marshalling data transmission method and device based on a
train Ethernet. The method comprises the following steps: responding to a cross-
marshalling data uploading instruction, controlling the local
marshalling ETBN to respectively convert the source
IP address and the destination
IP address of the uploaded message received from the local equipment into corresponding
train subnet addresses, and transmitting the uploaded message to the corresponding far-end marshalling ETBN according to the converted
train subnet addresses of the source
IP address and the destination IP address; and controlling the ETBN of the far-
end group to convert the train subnet address of the destination IP address of the received uploaded message into a corresponding local subnet address in the group, and transmitting the uploaded message to the corresponding target equipment according to the converted local subnet address. According to the invention, the updating, maintenance and diagnosis work of the
Ethernet layer of the whole train can be realized only by connecting a
single point into any group of the train, so that the train maintenance and diagnosis efficiency is improved, and the
workload of design and maintenance personnel is reduced.